| A nice mix of power, symboled YFW21R 16, is working the hump in Union Pacific's Davidson Yard in Fort Worth, Texas, on October 16, 2011. Lead engine UP SD40-2 8952 (still marked as an SD40-2B on the side of the cab) is ex-UP B4229, ex-UP 4229, nee-MP 3229. The other two engines are LLPX GP38-2 2277 and UPY RP20BD 2649. |